RandomURL.cs

//chnaged through visual studio 2017

// Required namespaces
using System;
using System.Collections.Generic;
using System.Web;

/// <summary>
/// RandomURL class generates Random URLs for applications.
/// </summary>

public class RandomURL
{
    // List of characters and numbers to be used...
    private static List<int> numbers = new List<int>() {1, 2, 3, 4, 5, 6, 7, 8, 9, 0};
    private static List<char> characters = new List<char>() 
    {'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 
    'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', 'A', 'B', 
    'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 
    'Q', 'R', 'S',  'T', 'U', 'V', 'W', 'X', 'Y', 'Z', '-', '_'};

    public static string GetURL () {    
        string URL = "";
        Random rand = new Random();
        // run the loop till I get a string of 10 characters
        for (int i = 0; i < 11; i++) {
            // Get random numbers, to get either a character or a number...
            int random = rand.Next(0, 3);
            if(random == 1) {
                // use a number
                random = rand.Next(0, numbers.Count);
                URL += numbers[random].ToString();
            } else {
                random = rand.Next(0, characters.Count);
                URL += characters[random].ToString();
            }
        }
        return URL;
    }
}